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* [3.8] Correct CVE-2020-10735 documentation (GH-100306) (#100698)Gregory P. Smith2023-01-201-2/+2
| | | | | | | (cherry picked from commit 1cf3d78c92eb07dc09d15cc2e773b0b1b9436825) (cherry picked from commit 88fe8d701af3316c8869ea18ea1c7acec6f68c04) Co-authored-by: Jeremy Paige <ucodery@gmail.com> Co-authored-by: Gregory P. Smith <greg@krypto.org>
* [3.8] gh-95778: CVE-2020-10735: Prevent DoS by very large int() (#96503)Gregory P. Smith2022-09-051-1/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Correctly pre-check for int-to-str conversion Converting a large enough `int` to a decimal string raises `ValueError` as expected. However, the raise comes _after_ the quadratic-time base-conversion algorithm has run to completion. For effective DOS prevention, we need some kind of check before entering the quadratic-time loop. Oops! =) The quick fix: essentially we catch _most_ values that exceed the threshold up front. Those that slip through will still be on the small side (read: sufficiently fast), and will get caught by the existing check so that the limit remains exact. The justification for the current check. The C code check is: ```c max_str_digits / (3 * PyLong_SHIFT) <= (size_a - 11) / 10 ``` In GitHub markdown math-speak, writing $M$ for `max_str_digits`, $L$ for `PyLong_SHIFT` and $s$ for `size_a`, that check is: $$\left\lfloor\frac{M}{3L}\right\rfloor \le \left\lfloor\frac{s - 11}{10}\right\rfloor$$ From this it follows that $$\frac{M}{3L} < \frac{s-1}{10}$$ hence that $$\frac{L(s-1)}{M} > \frac{10}{3} > \log_2(10).$$ So $$2^{L(s-1)} > 10^M.$$ But our input integer $a$ satisfies $|a| \ge 2^{L(s-1)}$, so $|a|$ is larger than $10^M$. This shows that we don't accidentally capture anything _below_ the intended limit in the check. <!-- gh-issue-number: gh-95778 --> * Issue: gh-95778 <!-- /gh-issue-number --> Co-authored-by: Gregory P. Smith [Google LLC] <greg@krypto.org> Co-authored-by: Christian Heimes <christian@python.org> Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
* bpo-38237: Shorter docstring (GH-16322) (GH-16323)Miss Islington (bot)2019-09-211-2/+2
| | | | | (cherry picked from commit b104ecbbafc14f9ca0c8371963c45dca893f6b75) Co-authored-by: Raymond Hettinger <rhettinger@users.noreply.github.com>
* bpo-38237: Let pow() support keyword arguments (GH-16302) (GH-16320)Miss Islington (bot)2019-09-211-18/+24
| | | Backported with release manager approval
* [3.8] bpo-37206: Unrepresentable default values no longer represented as ↵Serhiy Storchaka2019-09-144-8/+8
| | | | | | | | | | None. (GH-13933) (GH-16141) In ArgumentClinic, value "NULL" should now be used only for unrepresentable default values (like in the optional third parameter of getattr). "None" should be used if None is accepted as argument and passing None has the same effect as not passing the argument at all. (cherry picked from commit 279f44678c8b84a183f9eeb85e0b086228154497) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
* [3.8] bpo-37034: Display argument name on errors with keyword arguments with ↵Serhiy Storchaka2019-08-295-19/+19
| | | | | | | Argument Clinic. (GH-13593). (GH-15599) (cherry picked from commit 4901fe274bc82b95dc89bcb3de8802a3dfedab32) Co-authored-by: Rémi Lapeyre <remi.lapeyre@henki.fr>
* [3.8] bpo-37942: Improve argument clinic float converter (GH-15470) (GH-15480)Raymond Hettinger2019-08-251-4/+10
| | | (cherry picked from commit aef9ad82f7f667cd001a7112d3bc636e918626f7)
* bpo-35766: compile(): rename feature_version parameter (GH-13994) (GH-14001)Victor Stinner2019-06-121-5/+9
| | | | | | | | Rename compile() feature_version parameter to _feature_version and convert it to a keyword-only parameter. Update also test_type_comments to pass feature_version as a tuple. (cherry picked from commit efdf6ca90f7702824e7aeee1ceca949e7c20288a)
* bpo-36933: Remove sys.set_coroutine_wrapper (marked for removal in 3.8) ↵Matthias Bussonnier2019-05-281-28/+1
| | | | | | | | | | (GH-13577) It has been documented as deprecated and to be removed in 3.8; From a comment on another thread – which I can't find ; leave get_coro_wrapper() for now, but always return `None`. https://bugs.python.org/issue36933
* bpo-36829: Add _PyErr_WriteUnraisableMsg() (GH-13488)Victor Stinner2019-05-271-4/+5
| | | | | * sys.unraisablehook: add 'err_msg' field to UnraisableHookArgs. * Use _PyErr_WriteUnraisableMsg() in _ctypes _DictRemover_call() and gc delete_garbage().
* bpo-36842: Implement PEP 578 (GH-12613)Steve Dower2019-05-231-1/+33
| | | Adds sys.audit, sys.addaudithook, io.open_code, and associated C APIs.
* bpo-36829: Add sys.unraisablehook() (GH-13187)Victor Stinner2019-05-221-1/+17
| | | | | | | | | | | | | | | | | | | Add new sys.unraisablehook() function which can be overridden to control how "unraisable exceptions" are handled. It is called when an exception has occurred but there is no way for Python to handle it. For example, when a destructor raises an exception or during garbage collection (gc.collect()). Changes: * Add an internal UnraisableHookArgs type used to pass arguments to sys.unraisablehook. * Add _PyErr_WriteUnraisableDefaultHook(). * The default hook now ignores exception on writing the traceback. * test_sys now uses unittest.main() to automatically discover tests: remove test_main(). * Add _PyErr_Init(). * Fix PyErr_WriteUnraisable(): hold a strong reference to sys.stderr while using it
* bpo-36127: Argument Clinic: inline parsing code for keyword parameters. ↵Serhiy Storchaka2019-03-145-26/+206
| | | | (GH-12058)
* bpo-35975: Support parsing earlier minor versions of Python 3 (GH-12086)Guido van Rossum2019-03-071-7/+8
| | | | | | | This adds a `feature_version` flag to `ast.parse()` (documented) and `compile()` (hidden) that allow tweaking the parser to support older versions of the grammar. In particular if `feature_version` is 5 or 6, the hacks for the `async` and `await` keyword from PEP 492 are reinstated. (For 7 or higher, these are unconditionally treated as keywords, but they are still special tokens rather than `NAME` tokens that the parser driver recognizes.) https://bugs.python.org/issue35975
* bpo-36101: remove non-ascii characters in docstring (GH-12018)animalize2019-02-241-2/+2
| | | | | * remove non-ascii characters in docstring * clinic.py emits a warning when docstring has non-ascii character
* bpo-35582: Argument Clinic: Optimize the "all boring objects" case. (GH-11520)Serhiy Storchaka2019-01-114-49/+89
| | | | | Use _PyArg_CheckPositional() and inlined code instead of PyArg_UnpackTuple() and _PyArg_UnpackStack() if all parameters are positional and use the "object" converter.
* bpo-35582: Argument Clinic: inline parsing code for positional parameters. ↵Serhiy Storchaka2019-01-114-23/+91
| | | | (GH-11313)
* bpo-20182: AC convert Python/sysmodule.c (GH-11328)Tal Einat2018-12-311-4/+970
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* bpo-23867: Argument Clinic: inline parsing code for a single positional ↵Serhiy Storchaka2018-12-253-10/+45
| | | | parameter. (GH-9689)
* bpo-33012: Fix invalid function cast warnings with gcc 8 in Argument Clinic. ↵Serhiy Storchaka2018-11-276-29/+29
| | | | | | | | (GH-6748) Fix invalid function cast warnings with gcc 8 for method conventions different from METH_NOARGS, METH_O and METH_VARARGS in Argument Clinic generated code.
* bpo-34637: Make the *start* argument for *sum()* visible as a keyword ↵Raymond Hettinger2018-09-121-6/+7
| | | | argument. (GH-9208)
* Add docstrings to public methods from context.c (GH-8531)Peter Lamut2018-07-301-9/+36
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* bpo-32436: Implement PEP 567 (#5027)Yury Selivanov2018-01-231-0/+146
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* bpo-32591: Add native coroutine origin tracking (#5250)Nathaniel J. Smith2018-01-211-0/+66
| | | | | | * Add coro.cr_origin and sys.set_coroutine_origin_tracking_depth * Use coroutine origin information in the unawaited coroutine warning * Stop using set_coroutine_wrapper in asyncio debug mode * In BaseEventLoop.set_debug, enable debugging in the correct thread
* bpo-30579: Allow TracebackType creation and tb_next mutation from Python ↵Nathaniel J. Smith2018-01-071-0/+35
| | | | | | | | | | | | | | | | | (GH-4793) Third party projects may wish to hide their own internal machinery in order to present more comprehensible tracebacks to end users (e.g. Jinja2 and Trio both do this). Previously such projects have had to rely on ctypes to do so: https://github.com/pallets/jinja/blob/fe3dadacdf4cf411d0a5b6bbd4d5234697a28af2/jinja2/debug.py#L345 https://github.com/python-trio/trio/blob/1e86b1aee8c0c759f6f239ae53a05d0d3963c629/trio/_core/_multierror.py#L296 This provides a Python level API for creating and modifying real Traceback objects, allowing tracebacks to be edited at runtime. Patch by Nathaniel Smith.
* bpo-32240: Add the const qualifier to declarations of PyObject* array ↵Serhiy Storchaka2017-12-154-24/+24
| | | | arguments. (#4746)
* closes bpo-31650: PEP 552 (Deterministic pycs) implementation (#4575)Benjamin Peterson2017-12-091-1/+36
| | | | | | | | | | | | | | | | | | | | | | | | | Python now supports checking bytecode cache up-to-dateness with a hash of the source contents rather than volatile source metadata. See the PEP for details. While a fairly straightforward idea, quite a lot of code had to be modified due to the pervasiveness of pyc implementation details in the codebase. Changes in this commit include: - The core changes to importlib to understand how to read, validate, and regenerate hash-based pycs. - Support for generating hash-based pycs in py_compile and compileall. - Modifications to our siphash implementation to support passing a custom key. We then expose it to importlib through _imp. - Updates to all places in the interpreter, standard library, and tests that manually generate or parse pyc files to grok the new format. - Support in the interpreter command line code for long options like --check-hash-based-pycs. - Tests and documentation for all of the above.
* bpo-30950: Convert round() to Argument Clinic. (#2740)Serhiy Storchaka2017-11-151-1/+35
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* bpo-29464: Rename METH_FASTCALL to METH_FASTCALL|METH_KEYWORDS and make (#1955)Serhiy Storchaka2017-07-034-86/+22
| | | | | the bare METH_FASTCALL be used for functions with positional-only parameters.
* bpo-30600: Fix error messages (condition order in Argument Clinic) (#2051)Sylvain2017-06-103-63/+63
| | | | | | | | The function '_PyArg_ParseStack()' and '_PyArg_UnpackStack' were failing (with error "XXX() takes Y argument (Z given)") before the function '_PyArg_NoStackKeywords()' was called. Thus, the latter did not raise its more meaningful error : "XXX() takes no keyword arguments".
* Add reference to help('FORMATTING') in format() builtin (GH-166)Amit Kumar2017-05-291-2/+4
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* bpo-20185: Convert the marshal module to Argument Clinic. (#541)Serhiy Storchaka2017-03-121-0/+145
| | | Based on patch by Vajrasky Kok.
* Run Argument Clinic: METH_VARARGS=>METH_FASTCALLVictor Stinner2017-01-172-38/+86
| | | | | | | | Issue #29286. Run Argument Clinic to get the new faster METH_FASTCALL calling convention for functions using "boring" positional arguments. Manually fix _elementtree: _elementtree_XMLParser_doctype() must remain consistent with the clinic code.
* Run Argument Clinic: METH_VARARGS=>METH_FASTCALLVictor Stinner2017-01-173-9/+17
| | | | | Issue #29286. Run Argument Clinic to get the new faster METH_FASTCALL calling convention for functions using only positional arguments.
* Rename _PyArg_ParseStack to _PyArg_ParseStackAndKeywordsVictor Stinner2017-01-172-2/+2
| | | | Issue #29286.
* Issue #20185: Convert _warnings.warn() to Argument ClinicVictor Stinner2016-12-091-0/+38
| | | | Fix warn_explicit(): interpret source=None as source=NULL.
* Issue #27810: Rerun Argument Clinic on all modulesVictor Stinner2016-09-101-4/+4
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* Issue #27574: Decreased an overhead of parsing keyword arguments in functionsSerhiy Storchaka2016-08-141-3/+4
| | | | implemented with using Argument Clinic.
* - Issue #27332: Fixed the type of the first argument of module-level functionsSerhiy Storchaka2016-07-072-63/+62
|\ | | | | | | generated by Argument Clinic. Patch by Petr Viktorin.
| * Issue #27332: Fixed the type of the first argument of module-level functionsSerhiy Storchaka2016-07-072-63/+62
| | | | | | | | generated by Argument Clinic. Patch by Petr Viktorin.
* | Issue #26305: Argument Clinic now uses braces in C code as required by PEP 7.Serhiy Storchaka2016-06-092-25/+48
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* Regenerate Argument Clinic code for issue #26874.Serhiy Storchaka2016-05-011-2/+2
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* Rebuilt Clinic generated code.Larry Hastings2015-08-251-2/+2
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* Issue #24769: Interpreter now starts properly when dynamic loadingLarry Hastings2015-08-251-1/+28
| | | | is disabled. Patch by Petr Viktorin.
* Specify default values of semantic booleans in Argument Clinic generated ↵Serhiy Storchaka2015-05-301-5/+5
| | | | signatures as booleans.
* PEP 489: Multi-phase extension module initializationNick Coghlan2015-05-231-43/+60
| | | | | | | | | | | | | | | | | | | | | | | Known limitations of the current implementation: - documentation changes are incomplete - there's a reference leak I haven't tracked down yet The leak is most visible by running: ./python -m test -R3:3 test_importlib However, you can also see it by running: ./python -X showrefcount Importing the array or _testmultiphase modules, and then deleting them from both sys.modules and the local namespace shows significant increases in the total number of active references each cycle. By contrast, with _testcapi (which continues to use single-phase initialisation) the global refcounts stabilise after a couple of cycles.
* Issue #24007: Argument Clinic now writes the format of PyArg_Parse*() at theSerhiy Storchaka2015-04-232-31/+13
| | | | same line as function name.
* Issue #23944: Argument Clinic now wraps long impl prototypes at column 78.Larry Hastings2015-04-142-11/+21
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* Issue #23492: Argument Clinic now generates argument parsing code withSerhiy Storchaka2015-04-032-23/+23
| | | | PyArg_Parse instead of PyArg_ParseTuple if possible.
* Issue #23501: Argumen Clinic now generates code into separate files by default.Serhiy Storchaka2015-04-031-0/+659
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